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From aaron morton <aa...@thelastpickle.com>
Subject Re: what size file for LCS is best for 300-500G per node?
Date Wed, 06 Mar 2013 07:19:33 GMT
Don't forget you can test things http://www.datastax.com/dev/blog/whats-new-in-cassandra-1-1-live-traffic-sampling

Cheers

-----------------
Aaron Morton
Freelance Cassandra Developer
New Zealand

@aaronmorton
http://www.thelastpickle.com

On 5/03/2013, at 7:37 AM, "Hiller, Dean" <Dean.Hiller@nrel.gov> wrote:

> Thanks!
> Dean
> 
> On 3/4/13 7:12 PM, "Wei Zhu" <wz1975@yahoo.com> wrote:
> 
>> We have 200G and ended going with 10M. The compaction after repair takes
>> a day to finish. Try to run a repair and see how it goes.
>> 
>> -Wei
>> 
>> ----- Original Message -----
>> From: "Dean Hiller" <Dean.Hiller@nrel.gov>
>> To: user@cassandra.apache.org
>> Sent: Monday, March 4, 2013 10:52:27 AM
>> Subject: what size file for LCS is best for 300-500G per node?
>> 
>> Should we really be going with 5MB when it compresses to 3MB?  That seems
>> to be on the small side, right?  We have ulimit cranked up so many files
>> "shouldn't" be an issue but maybe we should go to 10MB or 100MB or
>> something in between?  Does anyone have any experience with changing the
>> LCS sizes?
>> 
>> I do read somewhere startup times of opening 100,000 files could be
>> slow????? Which implies a larger size so less files might be better?
>> 
>> Thanks,
>> Dean
>> 
> 


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